Electricity Asset Management Plan 2019-2029
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Vector Limited://
will be completed in FY20. A 0.5 MW 1.0 MWh BESS-microgrid is under construction in the remote northern rural area of Tapora (a large avocado growing region) and is scheduled for completion in FY20.
Population and Age The age of Vector’s BESS in service is young as can be seen in the table below.
Glen Innes BESS 1.0 MW/2.3 MWh
3 years
Warkworth South BESS 2.0 MW/4.8 MWh
1 year
Snells Beach BESS 2.75MW/6.7MWh
1 year
Harbour Bridge lights BESS
1 year
Table 4-9 Key statistics for Battery Energy Storage Systems
Condition and Health Apart from some deterioration of outdoor battery enclosures the BESS population is in good health and condition.
Strategy Battery energy storage systems are becoming one of the important systems to improve our network resilience especially in areas that are remote and far from zone substations and where it is cost prohibitive to construct additional subtransmission feeders and/or backstopping circuits – such locations are usually at the far reaches of rural networks. BESS will also continue to be deployed in areas where peak demand respite is required for the short term until the installation of additional subtransmission transformer capacity can be economically justified at which time the BESS system will be relocated to another site with the same capacity constraint. For this reason, our BESS systems are designed in a modular fashion that allows easy removal and redeployment. BESS integrated and designed as a microgrid will be rolled out in remote areas where the cost of backstopping is prohibitive. A BESS/microgrid is planned to be installed in the remote western beach settlement of Piha with commissioning expected in early FY20. BESS-microgrid systems are also planned for the remote beach communities in Bethells Beach and South Head. GXPs that supply Vector’s zone substations are equipped with capacitor banks or static compensators to support voltage and provide reactive power to maintain the power factor as defined in Connection Agreements. 150 MVAr is installed across the zone substation network in 3 MVAr step tranches. Population and Age Vector has capacitor banks at 27 zone substations and the graph below shows the age of Vector’s capacitor banks. Capacitor banks generally have an asset life of 20 years and Vector’s capacitor bank plants are approaching this age. 4.3.4 CAPACITOR BANKS AND STATIC COMPENSATORS Overview
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